Liam Costner is best known for being the son of acclaimed American actor and filmmaker Kevin Costner and Bridget Rooney. Although his family name is closely associated with Hollywood, Liam has maintained a notably private life and has largely stayed away from the entertainment spotlight.
Interest in Liam Costner often centers on his age, parents, siblings, family background, career, and relationship to his famous father. Kevin Costner has seven children, and Liam is his only child with Bridget Rooney. Publicly available information about Liam is considerably more limited than information about his father or some of his siblings, making it important to distinguish established facts from repeated claims found on celebrity biography websites.
This article examines what is publicly known about Liam Costner, including his family connections, early background, siblings, professional life, and private lifestyle.
Key Takeaways
- Liam Costner is the son of actor and filmmaker Kevin Costner and Bridget Rooney.
- He was born in November 1996; his exact birth date is inconsistently reported by secondary sources.
- As of September 2026, he is 29 years old.
- Liam has six paternal half-siblings: Annie, Lily, Joe, Cayden, Hayes, and Grace Costner.
- Unlike his father, Liam has generally maintained a private life away from Hollywood.
- Some biographical sources associate him with real estate, but detailed, authoritative information about his professional career is limited.
Biography Table
| Information | Details |
|---|---|
| Full Name | Liam Costner |
| Date of Birth | November 1996; exact day is inconsistently reported |
| Age | 29 as of September 2026 |
| Birthplace | Not reliably documented in authoritative public sources |
| Nationality | American |
| Profession | Public sources have associated him with real estate |
| Education | Not reliably documented |
| Years Active | Not applicable as a public entertainment career |
| Known For | Being the son of Kevin Costner and Bridget Rooney |
| Major Achievements | No independently documented public career achievements |
| Estimated Net Worth | Not reliably established |
Who Is Liam Costner?
Liam Costner is one of Kevin Costner’s seven children. He was born in 1996 following Kevin Costner’s relationship with Bridget Rooney. Unlike his father, who built a decades-long career as an actor, director, producer, and musician, Liam has not established a comparable public entertainment career.
Kevin Costner is known for films such as The Untouchables, Bull Durham, Field of Dreams, Dances with Wolves, and The Bodyguard, as well as the television series Yellowstone. His career has made the Costner surname internationally recognizable.
Liam, however, has generally remained outside the entertainment industry. Because he rarely appears in the media, relatively little verified information is available about his personal life.
Liam Costner’s Parents
Kevin Costner
Liam’s father is Kevin Michael Costner, an American actor, filmmaker, and musician. Born on January 18, 1955, in Lynwood, California, Kevin developed a major Hollywood career beginning in the late 1970s.
His breakthrough period included major roles in The Untouchables, Bull Durham, and Field of Dreams. He later directed and starred in Dances with Wolves, which won seven Academy Awards, including Best Picture and Best Director.
Kevin Costner is also the father of seven children. His children come from relationships with Cindy Silva, Bridget Rooney, and Christine Baumgartner. Liam is the only child he shares with Rooney.
Bridget Rooney
Liam’s mother is Bridget Rooney. She is associated with the Rooney family, a prominent American family connected historically with the Pittsburgh Steelers.
Rooney’s relationship with Kevin Costner in the mid-1990s resulted in the birth of Liam in 1996. She later married businessman William “Bill” Koch.
Because Bridget Rooney has also maintained a relatively private public profile compared with many Hollywood figures, detailed information about Liam’s upbringing is limited.
When Was Liam Costner Born?
Public sources consistently place Liam Costner’s birth in November 1996. However, secondary websites disagree about the exact day of his birth, with different dates appearing online.
For that reason, November 1996 is the more defensible detail to use when discussing his birth date. A source covering Kevin Costner’s children also identifies Liam as having been born in November 1996 without relying on a disputed specific day.
Since Liam was born in November 1996, he is 29 years old in September 2026 and will turn 30 in November 2026.
Liam Costner’s Siblings
Liam is part of a large blended family. Kevin Costner has seven children in total.
Annie Costner
Annie is Kevin Costner’s eldest child and Liam’s older paternal half-sister. She is the daughter of Kevin and his first wife, Cindy Silva.
Lily Costner
Lily is another of Kevin Costner’s daughters with Cindy Silva. She has pursued music and has also worked with her father on creative projects.
Joe Costner
Joe is Liam’s older paternal half-brother and another child of Kevin Costner and Cindy Silva. Joe has been involved in audio and music-related work.
Cayden Wyatt Costner
Cayden is Liam’s younger paternal half-brother and one of Kevin Costner’s three children with Christine Baumgartner.
Hayes Logan Costner
Hayes is another younger paternal half-brother of Liam. He was born in 2009 to Kevin Costner and Christine Baumgartner.
Grace Avery Costner
Grace is Liam’s youngest paternal half-sister. She is Kevin Costner’s youngest child and was born in 2010.
Kevin Costner’s Seven Children at a Glance
| Child | Mother | Birth Year |
|---|---|---|
| Annie Costner | Cindy Silva | 1984 |
| Lily Costner | Cindy Silva | 1986 |
| Joe Costner | Cindy Silva | 1988 |
| Liam Costner | Bridget Rooney | 1996 |
| Cayden Costner | Christine Baumgartner | 2007 |
| Hayes Costner | Christine Baumgartner | 2009 |
| Grace Costner | Christine Baumgartner | 2010 |
This family structure explains why Liam is sometimes described as one of Kevin Costner’s seven children and, more specifically, his only child with Bridget Rooney.
Liam Costner and Kevin Costner
The connection between Liam Costner and Kevin Costner is the main reason for public interest in Liam’s biography.
Kevin’s career has placed him in the public eye for decades, while Liam has taken a much quieter path. There is limited reliable reporting about their private relationship, so claims about how frequently they interact or what their personal relationship is like should not be treated as established facts without direct sourcing.
What is documented is their family relationship: Liam is Kevin Costner’s son, born in 1996 from Kevin’s relationship with Bridget Rooney.
Did Liam Costner Become an Actor?
There is no well-established record of Liam Costner developing a professional acting career comparable to his father’s.
This is an important distinction because being the child of a famous actor does not necessarily mean following the same profession. Kevin Costner became one of Hollywood’s most recognizable actors and filmmakers, while Liam has generally avoided the entertainment spotlight.
Some online biographies describe Liam as being involved in real estate or working as a real estate agent. Such reports appear repeatedly in secondary sources, but detailed information about his employer, business activities, professional history, or achievements is not well documented by major authoritative publications.
Consequently, it is more accurate to describe real estate as a reported professional association rather than present a detailed career history as firmly established fact.
Liam Costner’s Private Life
Privacy is one of the defining characteristics of Liam Costner’s public profile.
Unlike many celebrity children, Liam has not built a major public identity through acting, music, television, interviews, or frequent red-carpet appearances. As a result, information about his relationships, residence, daily activities, and other personal matters is limited.
This lack of information also means that online claims about a spouse, children, exact occupation, or personal finances should be approached carefully unless they can be traced to a reliable source.
A limited public record does not necessarily indicate anything unusual about someone’s life. In Liam’s case, it mainly means that he has not made extensive personal information part of the public record.
Why Is Liam Costner Famous?
Liam Costner is primarily known because of his family background.
His father, Kevin Costner, is an award-winning actor and filmmaker whose career includes major films and television productions. His mother, Bridget Rooney, comes from the prominent Rooney family. This gives Liam connections to both the entertainment world and a well-known American family network.
However, Liam’s own public identity remains relatively limited. He is not widely known for a specific acting role, film, television series, or other major entertainment achievement.
Liam Costner’s Career and Net Worth
Information about Liam Costner’s career and finances is not sufficiently documented to provide a dependable net-worth figure.
Several celebrity websites publish estimates or describe him as a real-estate professional. However, these reports do not provide enough independently verifiable financial information to establish an accurate personal net worth.
For that reason, it would be misleading to attach a specific dollar amount to Liam’s wealth without stronger evidence.
His father’s substantial entertainment career and his mother’s family background are separate matters and should not be used to calculate Liam’s personal finances.
What Makes Liam Costner’s Story Different?
Liam Costner’s biography is unusual mainly because of the contrast between his family visibility and his own privacy.
He was born into a family that already had significant public recognition. His father was an established Hollywood star, while his mother’s family had longstanding prominence in American sports and business circles. Yet Liam has largely remained outside the celebrity lifestyle.
That contrast explains much of the continued interest in his biography. People searching for Liam Costner often want to understand how someone connected to such recognizable figures has maintained a comparatively low public profile.
The available evidence suggests that privacy, rather than entertainment fame, is the central feature of Liam’s public story.
Frequently Asked Questions
How old is Liam Costner?
Liam Costner is 29 years old as of September 2026. Public sources place his birth in November 1996.
Who is Liam Costner’s father?
Liam’s father is Kevin Costner, the American actor, filmmaker, and musician known for films including Dances with Wolves, Field of Dreams, and The Bodyguard, as well as Yellowstone.
Who is Liam Costner’s mother?
His mother is Bridget Rooney. She is a member of the Rooney family and later married businessman William “Bill” Koch.
How many siblings does Liam Costner have?
Liam has six paternal half-siblings: Annie, Lily, Joe, Cayden, Hayes, and Grace Costner. Kevin Costner has seven children in total.
Is Liam Costner an actor?
There is no established record of Liam Costner having a professional acting career. Unlike his father, he has largely remained outside Hollywood’s entertainment spotlight.
What does Liam Costner do for a living?
Some secondary sources identify Liam with real estate, including reports describing him as a real estate agent. However, detailed and independently verified information about his professional career is limited.
Does Liam Costner have a public social-media presence?
There is no broadly established, authoritative public profile that provides a reliable overview of his social-media activity. Claims about accounts attributed to him should be verified carefully before being treated as authentic.
What is Liam Costner’s net worth?
There is no reliably established public figure for Liam Costner’s personal net worth. Online estimates vary, but available evidence does not provide a sufficiently dependable basis for a precise amount.
Conclusion
Liam Costner is best understood as a member of Kevin Costner’s blended family rather than as a Hollywood celebrity in his own right. Born in November 1996 to Kevin Costner and Bridget Rooney, he is Kevin’s only child with Rooney and one of seven children in the Costner family.
Although his family connections have generated considerable public curiosity, Liam has maintained a much lower profile than his father. Information about his career, finances, relationships, and personal life remains limited, with some details reported by secondary sources but not firmly established by authoritative documentation.
The clearest facts are therefore the simplest ones: Liam Costner is Kevin Costner’s son, Bridget Rooney’s son, and a member of a prominent American family. His decision to remain largely private has made his biography less extensively documented, but it has also distinguished his life from the highly public career of his famous father.
